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by AutoStatic
Thu Mar 17, 2016 12:49 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

I disabled ethernet but it really made not much difference. I noticed that those clicks and pops might be just running out of cpu power. They occur when activating a window etc. :( Then you might benefit from using a real-time kernel. This is my second time I'm using my R16 as an audio interface an...
by AutoStatic
Wed Mar 16, 2016 8:16 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

Synthberry wrote:Thanks for creating the Wiki page - very helpful stuff. Am well on the way to getting some nice synth code running on the Pi 3 as a result.
Awesome! Got my Pi3 in last week too :)
by AutoStatic
Wed Mar 16, 2016 8:15 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

At this point I realized Zoom R16 (which I have) playback support had been finally implemented in 4.4 kernels. Updated and got it working quite well. But there is minor problem. With Zynaddsubfx I get occasional snaps and pop without jack reporting xruns. I haven't tried tweaking ethernet settings....
by AutoStatic
Wed Mar 16, 2016 8:10 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

Further experimentation showed that a 6 period buffer with 8 frame period size yields MIDI note-on to sound start latency of 2 milliseconds. Those are a bit weird values but if it works it works ;) The consensus is to use a period buffer size of 3 for bus-driven devices (USB, FireWire) and a size o...
by AutoStatic
Tue Mar 15, 2016 4:57 pm
Forum: Raspbian
Topic: Rasbian repository for audio related software packages
Replies: 29
Views: 13278

Re: Rasbian repository for audio related software packages

Long overdue but I've uploaded LinuxSampler 2.0.0 to my Raspbian Jessie repository. Raspbian Wheezy users are out of luck unless someone knows a way to compile LinuxSampler 2.0.0 with a GCC version <= 4.8.
by AutoStatic
Tue Mar 15, 2016 4:52 pm
Forum: Raspbian
Topic: Rasbian repository for audio related software packages
Replies: 29
Views: 13278

Re: Rasbian repository for audio related software packages

a2jmidid should work but nowadays you might want to look at the built-in JACK-ALSA MIDI bridges for Jack1 and Jack2. When using -Xseq they should get loaded with recent versions of Jack1 and Jack2. Which Raspbian are you using? The Wheezy or the Jessie one?
by AutoStatic
Thu Feb 25, 2016 6:03 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

One more thing I noticed in your posts Jeremy that you use commands a la Ubuntu A la Debian you mean ;) sudo apt-get install Is this available in Arch? No, unfortunately Arch lacks such a sophisticated package manager ;) Second, am I better off with a Pi2 to start with...for more resources? Or mayb...
by AutoStatic
Thu Feb 25, 2016 6:00 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

[gixie@alarmpi ~]$ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA] Subdevices: 8/8 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 Subdevice #3: subdevice #3 Subdevice #4: subdevice #4 Subdevice...
by AutoStatic
Wed Feb 24, 2016 6:47 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

Hello everybody, I started looking into a guitar effects processor based on a pi or pi2 (I own both and a couple of 0s). I managed to get everything working under Ubuntu x64 un a modified Asus Chromebox with an external M-Audio Fast Track device. I can't for the love of it get it to work on the Pi'...
by AutoStatic
Wed Feb 24, 2016 6:34 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

i searched many days and weeks in the web for a professional teacher :shock: . now i think i found you because i think you knows very well the sampling world with low latency raspberry, teensy or other mini pc. I'm in no way a professional teacher :oops: i want to play different sounds(bass samples...
by AutoStatic
Mon Oct 05, 2015 9:04 pm
Forum: General discussion
Topic: Raspberry Pi as a synth
Replies: 9
Views: 3417

Re: Raspberry Pi as a synth

For anyone who is following this thread or accidentally stumbled upon it: http://autostatic.com/tag/synth-module/
I'm currently trying to put together a synth module based on ZynAddSubFX.
by AutoStatic
Tue Jun 09, 2015 2:50 pm
Forum: Raspbian
Topic: raspbian: kernel update
Replies: 6
Views: 1123

Re: raspbian: kernel update

ShiftPlusOne wrote:For what it's worth, this is how it's built: https://github.com/RPi-Distro/firmware
Awesome, thanks, that's all I need. I should have been more clear with my question. I just wanted to know how these packages were built as I am tinkering with building these kind of packages myself.
by AutoStatic
Tue Jun 09, 2015 11:27 am
Forum: Raspbian
Topic: raspbian: kernel update
Replies: 6
Views: 1123

Re: raspbian: kernel update

Would it be possible to publish the source package files for the raspberrypi-firmware package so I can do an apt-get source raspberrypi-firmware?
by AutoStatic
Sat Jun 06, 2015 8:27 pm
Forum: Raspbian
Topic: Rasbian repository for audio related software packages
Replies: 29
Views: 13278

Re: Rasbian repository for audio related software packages

Just a quick addendum, the cirrus-config and linux-image packages have been tested on both the RPi1 and the RPi2.
by AutoStatic
Thu Jun 04, 2015 6:40 pm
Forum: Raspbian
Topic: Rasbian repository for audio related software packages
Replies: 29
Views: 13278

Re: Rasbian repository for audio related software packages

For those interested I've uploaded the following packages to my Raspbian repository (http://rpi.autostatic.com/): linux-image-cirrus: meta package that installs a kernel with Wolfson/Cirrus Logic audio interface support cirrus-config-overlay: package that installs the device tree overlay file for th...
by AutoStatic
Thu May 15, 2014 8:48 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

Are you using Jack1 or Jack2? If it's Jack1 try lowering the rtprio to 84 instead of 89. It seems Jack1's watchdog thread gets in the way.
by AutoStatic
Thu May 15, 2014 5:08 am
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

cannot use real-time scheduling (FIFO at priority 99) [for thread -1246063504, from thread -1246063504] (1: Operation not permitted) sudo dpkg-reconfigure jackd2 (or jackd1 if you have that installed) Select Yes when asked to enable realtime process priority sudo usermod -a -G audio youruser yourus...
by AutoStatic
Wed May 14, 2014 6:44 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

Hello Walle, From the website of the author of the Digidesign Mbox 2 kernel module: Any config issues with JACK, make sure you are using the ALSA backend and 2 ins and 2 outs, >256 buffer size and 3 periods So maybe JACK works better like this: jackd -P89 -p16 -t2000 -dalsa -dhw:1 -p256 -n3 -i2 -o2 ...
by AutoStatic
Thu May 08, 2014 6:44 pm
Forum: Graphics, sound and multimedia
Topic: MIDI sound issues
Replies: 5
Views: 1707

Re: MIDI sound issues

I don't know how to describe it properly, the sound is distorted, not clear. Sounds like buffer under runs: http://www.linuxjournal.com/article/6735?page=0,1#N0x19ab2890.0x19ba7ca0 I run jack via "/usr/bin/jackd -dalsa -dhw:0 -r44100". The onboard audio is not the best option for doing low-latency ...
by AutoStatic
Wed May 07, 2014 7:12 am
Forum: Graphics, sound and multimedia
Topic: MIDI sound issues
Replies: 5
Views: 1707

Re: MIDI sound issues

morgon wrote:The same setup on the Pi works in principle but the resuting sound (speakers connected via the 3.5mm cinch) is awful.
Describe awful ;)
morgon wrote:Any other ideas on what I could try?
What JACK settings are you using?
by AutoStatic
Mon Apr 28, 2014 7:38 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

https://github.com/AutoStatic/configs/tree/rpi/home/pi/drumkv1 If you have jalv installed from my repository you can create presets yourself: ssh -X into your RPi Run jalv.gtk http://drumkv1.sourceforge.net/lv2 Create your presets (warning: this process can be slow and tedious on the RPi) Save your ...
by AutoStatic
Fri Apr 25, 2014 3:12 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

I'll post it if I find time!
by AutoStatic
Wed Apr 16, 2014 8:31 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

Bus 001 Device 007: ID 1941:8021 Dream Link WH1080 Weather Station / USB Missile Launcher Unfortunately this is the non-USB MIDI version of the foldable drumpad, I know because I have both versions: http://lists.linuxaudio.org/pipermail/linux-audio-user/2013-March/091142.html So in the context of L...
by AutoStatic
Tue Apr 15, 2014 7:36 pm
Forum: Graphics, sound and multimedia
Topic: RPi and real-time, low-latency audio
Replies: 189
Views: 78157

Re: RPi and real-time, low-latency audio

Thanks for your quick reply :] The 2 lines are now in etc/udev/rules.d/10-drumpad.rules! Could you post the output of lsusb to make sure the vendor and product ID's match? But i dont know where and how to place the drumpad script? You can place it wherever you like, I prefer putting user scripts in...

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